Well I actually pretty much agree with "them" on the used games thing. I don't think this industry is like every other industry and thus comparisons don't work too well. I think the system they used in ME2 was good, but what they are doing now is pushing it over the line.
How is it different to a movie ? series ?
You buy it for a limited time enjoyment, you might not want to rewatch them, in which case you sell them, or you do want, in case you keep them.
For games, most gamers will reinvest the money they got back to purchase more games, therefore HELPING the game industry. (Because they need to add to that amount.)
There's no difference, it's only what some people with an agenda to steal from you would like you to believe.
(But I'm going off topic, should this discussion generate enough interest I'll move the posts to a new thread.)